The X Factor USA judge recently confirmed she is "working hard" on her next album, and "collaborating with some new inspiring producers", fuelling speculation about who they might be.

Britney's rep has now confirmed to Entertainment Weekly that she's been in the studio with hip-hop guru Hit-Boy, the producer behind Kanye West and Jay-Z's N****s in Paris, and Black Eyed Peas star Will.i.am.

Elijah Blake - who has worked with Usher and Rihanna - said in a recent interview he had been collaborating with Britney on her new album, but her representative denied she had worked with him.